The First Investigative Division is the star unit of the Tokyo Metropolitan Police Department. Oiwa Junichi (Naito Takashi), the head of the division, leads around 400 elite detectives. He has an extremely heavy responsibility - attends initial investigations at the scenes of all brutal crimes that occur within the metropolis, decides on the course of action of the investigations at the same time as he directs many investigation task forces and getsinto investigations himself at the critical phase. However, Oiwa is definitely not a superman. Amid his suffering, Oiwa overcomes this grave responsibility and is quite simply a”life-size hero” and “ideal boss” to his subordinates. Season 3 will create more cases to attract the mystery fans, it will also include information on the actual Japan.